WO2021085746A1 - Apparatus for decomposing and immobilizing greenhouse gas including cement firing furnace - Google Patents

Abstract

The present invention relates to an apparatus which is for decomposing and immobilizing a greenhouse gas and includes a cement firing furnace, wherein a plasma combustion system can be used to perform gasification and combustion through the thermal decomposition of plastic waste to provide an additional heat source to a preheating tower attached to the cement firing furnace and elevate the temperature of the cement firing furnace, and thereby thermally decompose the greenhouse gas. The present invention provides an apparatus which is for decomposing and immobilizing a greenhouse gas and includes a cement firing furnace, the apparatus comprising a plasma combustion system including: (a) a combustion reactor; 4-20 plasma combustion means for supplying plasma to the combustion reactor; and (c) a fuel supplying means which is connected to the upper portion of the combustion reactor and supplies plastic waste in the direction of the combustion reactor, wherein high-temperature gas discharged from the plasma combustion system is supplied by being mixed with fuel for heating a preheating tower attached to the cement firing furnace, and the greenhouse gas is injected into the cement firing furnace and thermally decomposed.

Description

Greenhouse gas decomposition and immobilization device including cement kiln

The present invention relates to a greenhouse gas decomposition and immobilization apparatus including a cement kiln, and more particularly, gasification and combustion through pyrolysis of waste plastics discarded using a plasma combustion system. It is possible to increase the temperature of the cement kiln by supplying a heat source, and accordingly relates to a greenhouse gas decomposition and immobilization device including a cement kiln capable of pyrolyzing greenhouse gases.

Plastic is a kind of polymer compound that is produced by combining raw materials extracted from petroleum, mainly refers to a macromolecule in which several functional groups including hydrogen are bonded around a carbon skeleton. Initially, it was mainly developed to replace natural resins such as rubber or rosin, and is called synthetic resin, but nowadays, millions of plastics having various properties have been developed, and are used at an overwhelming ratio compared to the amount of natural resin. The first plastic developed was a phenolic resin (bakelite) developed to replace ivory used for billiard balls, and was manufactured in 1907 by polymerizing phenol and formaldehyde. These early plastics were considered only as a substitute for ivory or children's toys, but recently, plastics are recognized as an indispensable and important material in all industries. In particular, engineering plastics that have solved the strength problem, which is a disadvantage of conventional plastics, are in the spotlight as a substitute for steel materials, and plastics are used in most products that are concerned about breakage because they have superior stability compared to glass or iron when damaged.

Plastics are largely divided into thermoplastic resins and thermosetting resins depending on whether they can be softened by heat. Thermoplastic resins are plastics that have fluidity due to loosening bonds between polymer chains when heat is applied. However, they are easily recycled and are widely used in household goods fields. Thermosetting resins are plastics that increase strength by strengthening the bonds between polymer chains when heat is applied.Before curing, they are liquids or solids with fluidity that are easy to process.However, after curing, they do not deteriorate in fluidity due to heat, so recycling is almost impossible. Have. However, since these thermosetting plastics have higher strength and better heat resistance than thermoplastic plastics, they are mainly used in industrial sites such as engineering plastics that require high strength.

As these plastics are easy to process, they can be manufactured in a desired shape and color, and have the advantage that natural decomposition hardly appears, so that they have a long lifespan and can easily manufacture desired properties.However, in the natural state, it takes a very long time to decompose and after use. The treatment of plastics is a problem. In general, plastics after use are buried, but there is a limitation because it takes a lot of time to decompose when buried. Therefore, as a method to solve this problem, a method of recycling plastic raw materials has been proposed, but only thermoplastic resins can be recycled, and there is a difficulty in separating millions of plastics by type, so the recycling rate is not significantly improved. to be.

Biodegradable plastics are being developed to solve the disadvantages of these plastics. However, in the case of such biodegradable plastics, it is difficult to use for a long period of time and is not only used in a limited field because of its physical properties compared to general plastics, and it is difficult to use it unlimitedly because the impact of the environment after decomposition has not been fully understood.

However, in the case of plastics, most of them are petroleum-derived materials and polymer materials having a basic carbon-based skeleton, so methods of using them as fuel are also being developed. Plastics can generate heat similar to fossil fuels of the same weight, so if they are used as fuel, it is expected to be able to replace part of fossil fuels. However, plastic is a material with a high molecular weight, and incomplete combustion occurs during combustion and often generates toxic gases, and various additives added to reinforce the physical properties of plastics are also pointed out as a source of large amounts of toxic gases, so they are used as fuel. It has been limitedly practiced.

Meanwhile, in the case of a cement kiln, a kiln-type reactor is mainly used. This kiln is a kind of kiln that can be used for cement firing, and rotary type kiln is mainly used for continuous operation. In the case of the rotary kiln, it is composed of a pipe-shaped reactor having a certain angle with the ground, and raw materials are supplied from one side of the reactor, which is reacted while moving to the other side of the reactor as the pipe-shaped reactor rotates. At this time, the raw material is mixed by repeatedly rising to a certain height by the rotation of the reactor and then falling downward by gravity, and bituminous coal is used as a heating means at the end of the reactor to maintain the reactor at a constant temperature. Such a rotary kiln has a characteristic that mixing is repeated by rotation, and the production amount can be adjusted according to the diameter and rotation speed of the reactor. At this time, in order to maintain the kiln at a constant temperature, a large amount of heat is required, and accordingly, a large amount of fossil fuel is used, and thus an effort to reduce this is required.

The need for fluorine-based gas treatment technology is emerging due to the continuous increase in the use of fluorine-based gas with high GWP, and research and development of low-concentration SF6 and HFCs recovery, decomposition, and treatment technologies have been carried out a lot. It has no processing technology. In addition, with the recent signing of the Convention (Kyoto Protocol) to prevent global warming in order to reduce the amount of carbon dioxide generated in terms of environmental protection, the reduction of greenhouse gases has emerged as a general issue of society, thus achieving the removal and harmlessness of these high-concentration greenhouse gases. You need a process that can be done.

(Patent Document 0001) Korean Registered Patent No. 10-1201426

(Patent Document 0002) Republic of Korea Patent Publication No. 10-2012-0000940

In order to solve the above-described problem, the present invention gasifies and combusts through pyrolysis of discarded plastics using a plasma combustion system, so that an additional heat source is supplied to the preheating tower attached to the cement kilns to increase the temperature of the cement kilns. Accordingly, it is intended to provide an apparatus for decomposing and fixing greenhouse gases including a cement kiln capable of pyrolyzing greenhouse gases.

In order to solve the above problems, the present invention provides a greenhouse gas decomposition and immobilization apparatus including a cement kiln (a) a combustion reactor; (b) 4 to 20 plasma combustion means for supplying plasma to the combustion reactor; (c) a plasma combustion system including fuel supply means connected to the upper half of the combustion reactor and supplying waste plastic in the direction of the combustion reactor, and the high-temperature gas discharged from the plasma combustion system is attached to the cement kilns. It provides a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that it is supplied by mixing with fuel for heating the preheating tower, and pyrolyzing by injecting greenhouse gas into the cement kiln.

The cement kiln may pyrolyze greenhouse gases at a temperature of 1500 to 3000°C.

The greenhouse gases may be SF6 or HFCs.

The greenhouse gas can be converted to CaF2.

In the combustion reactor, the fuel supply means may be connected to an upper side, and a gas outlet may be formed at a lower side of the other side.

An auxiliary combustion means for additionally supplying air or oxygen may be installed at an inner lower portion of the combustion reactor.

In the auxiliary combustion means, 2 to 100 perforated portions are arranged at regular intervals, and air or oxygen may be supplied through the perforated portions.

The combustion reactor may have an internal temperature of 500 to 2000°C, and a temperature of the discharged gas may be 800 to 2000°C.

The plasma combustion means may be arranged at regular intervals on both sides of the combustion reactor along a direction horizontal to the bottom of the combustion reactor.

Each of the plasma combustion means may have an output of 10 to 50 kW, and a discharge temperature of the plasma may be 5000 to 7000 K.

The fuel supply means may include a fuel transfer means including one or more screws or a pressure feeding device rotating in opposite directions to each other therein.

A fuel dispersing means capable of uniformly supplying the waste plastic into the combustion reactor may be installed between the fuel supply means and the combustion reactor.

The fuel dispersing means may include a mesh net, a structure at regular intervals arranged in multiple layers, a rotating circular plate, or a rotating blade.

Some or all of the heated air generated inside the kiln may be mixed with air and then supplied to the plasma combustion system.

The apparatus for decomposing and fixing greenhouse gases including a cement kiln according to the present invention introduces a plasma combustion system to convert greenhouse gases at a high temperature that cannot be reached in a conventional kiln, and can greatly improve the temperature in the kiln. CaF2 generated at the same time by converting high-concentration greenhouse gas to CaF2 to be detoxified can be expected to improve the physical properties of cement, and the plasma combustion system uses waste plastic as fuel, thereby detoxifying high-concentration greenhouse gas, It has the advantage of being able to improve the physical properties of cement and treat waste plastics at the same time.

In the present invention, greenhouse gases can be converted to CaF2 and CaSO4 after pyrolysis. In the case of CaF2, the sintering temperature is lowered by about 100℃ during limestone decarboxylation, thereby reducing energy consumption. In the case of CaSO4, it is an essential auxiliary material in cement manufacturing, delaying condensation, increasing short-term strength, reducing drying shrinkage, and improving chemical resistance. There are effects such as letting go.

1 is a schematic view showing the concept of an alternative fuel gasification apparatus and a cement kiln including a plasma combustion system according to an embodiment of the present invention.

2 is a view showing a combination of a plasma combustion system and a cement kiln according to an embodiment of the present invention.

3 is a photograph showing the plasma generation of the plasma combustion means according to an embodiment of the present invention.

4 is a schematic view showing a combination of a combustion reactor and a plasma combustion means according to an embodiment of the present invention.

5 is a schematic diagram of a method of operating a combustion reactor according to an embodiment of the present invention.

6 is a view showing a raw material supply means according to an embodiment of the present invention.

7 is a view showing a means for supplying high-temperature waste gas air generated in the kiln according to an embodiment of the present invention.

8 schematically shows the shape of the combustion reactor and the location of the thermocouple thermometer according to an embodiment of the present invention.

9 is a result of measuring the temperature of each part of the combustion reactor using the kilns generated gas according to an embodiment of the present invention.

10 is a result of measuring the temperature of each part of the combustion reactor that does not use the kilns generated gas according to an embodiment of the present invention.

11 is a photograph of the collected combustion reactor residue according to an embodiment of the present invention.

12 is an FE-SEM photograph of the collected combustion reactor residue according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail. In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted. Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

The present invention is intended to illustrate specific embodiments and to be described in detail in the detailed description, since various transformations may be applied and various embodiments may be provided. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all conversions, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms used in the present invention are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present invention, terms such as include or have are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination of them described in the specification, and one or more other features, numbers, and steps. It is to be understood that it does not preclude the possibility of the presence or addition of, operations, components, parts, or combinations thereof.

The present invention provides a greenhouse gas decomposition and immobilization apparatus including a cement kiln (a) a combustion reactor; (b) 4 to 20 plasma combustion means for supplying plasma to the combustion reactor; (c) a plasma combustion system including fuel supply means connected to the upper half of the combustion reactor and supplying waste plastic in the direction of the combustion reactor, and the high-temperature gas discharged from the plasma combustion system is attached to the cement kilns. It relates to a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that the preheating tower is mixed with fuel for heating and supplied, and thermally decomposed by injecting a greenhouse gas into the cement kiln.

The combustion reactor is a device that gasifies and supplies waste plastic supplied from the fuel supply means, and is manufactured in a square or circular pipe shape, and a fuel supply means is installed on one side of the axial direction, and a gas discharge means is installed on the other side. I can. The combustion reactor may also be manufactured in a vertical cylindrical shape or a square column shape. In this case, a fuel supply means may be connected to an upper side, and a gas discharge means may be installed on the other side of the lower side. That is, it is preferable that the fuel supply means is installed at the upper end of one side of the combustion reactor, and the gas discharge means is installed at the lower end of the other side. Accordingly, the waste plastic supplied by the fuel supply means passes through the combustion reactor and is discharged toward the gas discharge port on the other side, and the generated gas may also be discharged toward the gas discharge port.

In addition, the combustion reactor may be manufactured as a combustor having a single combustion unit, and may be composed of two stages of an upper portion 100 and a lower portion 110 in order to increase combustion efficiency (see FIG. 4 ). At this time, a plasma combustion means 200 is installed at the upper end, and an air supply nozzle for combustion may be positioned at the lower end to perform combustion more smoothly. In this case, the air supplied from the combustion air supply nozzle additionally oxidizes the first combustion gas at the upper end of the combustion reactor and is supplied to the gas discharge means, and at the same time, part of the air is supplied to the upper end of the combustion reactor to perform primary combustion. You can do it. When the combustion reactor is operated by dividing the combustion reactor into an upper part and a lower part, since the waste plastic is gasified and completely combusted, the amount of ash and tar generated can be remarkably reduced (see FIG. 5).

An auxiliary combustion means capable of supplying air or oxygen may be installed at an inner lower portion of the combustion reactor. In the case of the combustion reactor, as air and combustibles are supplied from the upper portion, in the case of the alternative fuel (waste plastic) stacked at the lower portion, the supply of oxygen is not smooth, and incomplete combustion may occur. Therefore, it is desirable to smoothly supply oxygen by installing auxiliary combustion means for supplying additional gas in the combustion reactor. At this time, the auxiliary combustion means may simply supply external air, and it is also possible to supply pure oxygen. In addition, in the auxiliary combustion means, 2 to 100 perforated portions are arranged at regular intervals, and air or oxygen may be supplied through the perforated portions.

The combustion reactor may include 4 to 20 plasma combustion means for supplying plasma (see FIG. 4). In the case of conventional waste plastic combustors, fossil fuels were used to perform combustion. However, in the case of fossil fuels, not only can it generate its own toxic gas, but also the amount of carbon dioxide generated increases, so its use is limited. In addition, in the case of the combustor using the fossil fuel, the flame temperature is operated at a low temperature, and thus the temperature inside the combustion reactor is not significantly increased. Accordingly, in the present invention, the same combustion reaction can be performed while increasing the temperature inside the combustion reactor using the plasma combustion means, minimizing the amount of fossil fuel used, and minimizing the amount of heat used due to the high temperature.

The plasma combustion means may be arranged at regular intervals on both sides of the combustion reactor along a direction horizontal to the bottom of the combustion reactor (see FIG. 4). In the case of the plasma combustion means, it is preferable to uniformly supply plasma into the combustion reactor. In particular, when the waste plastic accumulates on the bottom of the combustion reactor due to the fall of the waste plastic, it is preferable to be arranged at regular intervals on both sides of the combustion reactor along a direction horizontal to the bottom of the combustion reactor in order to burn it uniformly. However, when the combustion reactor is composed of two stages at an upper end and a lower end, 2 to 16 plasma combustion means are disposed at the upper end, and 2 to 4 are disposed at the lower end to prevent waste plastic falling on the upper end. It is desirable to burn intensively (see Figs. 4 and 5).

The combustion reactor may have an internal temperature of 500 to 2000°C, and a temperature of the discharged gas may be 800 to 2000°C. In the case of conventional plastic incinerators using fossil fuels, the internal temperature is about 900 to 1400°C, and the temperature has not been reached enough to completely burn the plastic and gasify it. However, in the case of the present invention, combustion can be performed at a high temperature using a plasma combustion means, and the internal temperature can be maintained at 500 to 2000°C by preventing temperature drop as much as possible. This internal temperature is very different depending on the type of plastic supplied, but in general, the higher the carbon ratio and the lower the average molecular weight of the polymer, the higher the temperature may be. In addition, when the temperature inside the combustion reactor is lowered to less than 500° C., tar may be deposited inside the combustion reactor due to an incomplete reaction of plastics. Therefore, it is preferable that the temperature inside the combustion reactor be 500°C or higher. In addition, since the combustion reactor has an inlet temperature as low as possible, and the exhausted gas is exhausted from the combustion reactor, a gas having a temperature higher than 500°C, which is the minimum temperature of the combustion reactor, may be discharged. Therefore, the temperature of the discharged gas may be 800 ~ 2000 ℃. If the temperature of the discharged gas is less than 800°C, tar may be deposited at the gas outlet, and if it exceeds 2000°C, the gas outlet is overheated, so additional heat dissipation equipment must be provided, so economical efficiency may be degraded.

In addition, the high-temperature gas discharged as described above may serve to increase the temperature of the preheating tower and the temperature of the kiln while being supplied to the preheating tower attached to the cement kiln. In the case of the existing cement kiln, the maximum temperature is 1500℃ or less, but in this case, it is difficult for the greenhouse gas to reach around 2000℃, which is the temperature at which the maximum pyrolysis efficiency is achieved. However, in the case of the present invention, since an additional amount of heat is supplied using the plasma combustion system, the greenhouse gas can be pyrolyzed at an optimum temperature.

At this time, the greenhouse gas may be SF6 or HFCs. Although the use of SF6 or HFCs is limited as a representative material exhibiting a greenhouse effect, in the case of high concentration SF6 or HFCs, a large amount is used as a cleaning agent or other additives. However, in the case of such high concentration SF6 or HFCs, their decomposition temperature is high and there is a problem in treatment cost, so they are recovered and reused rather than decomposed and detoxified. Therefore, when the greenhouse gas is converted to CaF2, it can be used as an additive that not only removes the high-concentration greenhouse gas, but also enhances the physical properties of the cement to be fired.

At this time, the decomposition of SF6 or HFCs may be performed through a chemical reaction as follows.

SF ₆ + 4CaO → 3CaF ₂ + CaSO ₄

2CHF ₃ + CaO → CaF ₂ + 2CF ₂ + H ₂ O

That is, the SF6 or HFCs react with calcium oxide in limestone to convert to CaF2, and the CaF2 is used as an additive in cement to enhance the physical properties of the cement. However, since such a chemical reaction is efficient at a high temperature (1500°C) or higher, a high-temperature cement kiln is required, and accordingly, an additional heat source such as the present invention may be required.

In the present invention, greenhouse gases can be converted to CaF2 and CaSO4 after pyrolysis. In the case of CaF2, the sintering temperature is lowered by about 100℃ during limestone decarboxylation, thereby reducing energy consumption. In the case of CaSO4, it is an essential auxiliary material in cement manufacturing, delaying condensation, increasing short-term strength, reducing drying shrinkage, and improving chemical resistance. There are effects such as letting go.

The fuel supply means may include a fuel transfer means including one or more screws or a pressure feeding device rotating in opposite directions to each other therein (FIG. 6). In the case of the existing plastic incinerator, a method of constantly supplying waste plastic using a hopper was used. However, this method of using a hopper inevitably causes a temperature drop inside the combustion reactor due to the simultaneous supply of the waste plastic. The result was that the tar was settled. Accordingly, in the present invention, a fuel transfer means including one or more screws rotating in opposite directions or a pressure feeding device is installed inside the fuel supply means to continuously supply waste plastic at a constant speed to lower the temperature inside the combustion reactor. It is desirable to prevent it. In addition, even if the waste plastic is supplied using the fuel transfer means as described above, when the waste plastic is intensively supplied only to a certain space inside the combustion reactor, uniform combustion is not possible and a local temperature drop may occur. It is preferable that a fuel dispersing means capable of uniformly supplying the waste plastic into the combustion reactor is installed between the combustion reactor and the combustion reactor. The fuel dispersing means uniformly supplies the waste plastic supplied by the fuel supply means to the inside of the combustion reactor, thereby preventing a temperature drop, enabling a uniform combustion reaction, and preventing the generation of tar as much as possible. The fuel dispersing means can be used without limitation as long as it is capable of uniformly distributing the waste plastic in the combustion reactor, but dispersing the waste plastic using a mesh net, a structure at regular intervals arranged in multiple layers, or rotating blades desirable.

The cement kilns supply the gas generated from the alternative fuel gasification device to a preheating tower, and supply the same as fuel for heating the kilns for combustion, and supply some or all of the heated air generated in the kilns to the alternative fuel gasification device. have. In the case of the preheating tower attached to the cement kiln, the existing fossil fuel is used to supply the heat required for firing, but efforts to reduce the emission of carbon dioxide are continuing, so there is a limit to improving the heat quantity. Therefore, in the present invention, the waste plastic is incinerated using the alternative fuel gasification device and the gas generated after incineration is supplied to the preheating tower attached to the cement kilns to perform additional combustion, thereby supplying additional heat without generating carbon dioxide. This is possible. In addition, it is as described above that the optimum decomposition temperature of the greenhouse gas can be reached due to the amount of heat added in this way.

In addition, it is possible to increase the combustion efficiency of the combustion reactor by supplying high-temperature waste gas air generated in the cement kiln to the combustion reactor. Looking at this in detail, the sintering of the cement by heat is continuously performed inside the sintering furnace, and internal air is also discharged as the fired cement is discharged. High-temperature waste gas air is generated in the process of cooling the clinker, a semi-finished cement product produced through this. When this is supplied to the combustion reactor and used as combustion air, combustion efficiency can be greatly increased. In this case, the heated air generated inside the kiln may be partially or entirely supplied to the combustion reactor depending on the amount of oxygen consumed in the combustion reactor, and externally supplied to the combustion reactor in order to maintain the optimum temperature inside the combustion reactor. It can be supplied in a form mixed with air. In this case, the heated air generated inside the kiln may have a temperature of 500 to 1000°C. In addition, when the air inside the kiln is recycled as described above, unreacted greenhouse gases can be recycled and treated as well, so the conversion rate of greenhouse gases can also be increased.

The cement kiln may detoxify harmful gases contained in the gas supplied from the alternative fuel gasifier. Since the preheating tower attached to the cement kilns burns the gas supplied from the alternative fuel gasification device once more to supply heat, it is possible to oxidize and remove various harmful gases contained in the gas supplied from the alternative fuel gasification device. In particular, in the case of dioxins, HCN, CO, or NOx, which are frequently generated during the incineration of waste plastics, most of the harmful gases generated from the existing waste plastic incinerators can be removed by using additional incineration and prevention facilities owned by the kiln. At this time, the harmful gas may be converted into the form of N2, CO2 or H2O and removed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, certain features shown in the drawings are enlarged or reduced or simplified for ease of description, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

Example 1

An experiment was conducted to measure the effect of the alternative fuel gasification combustion apparatus including the plasma combustion system according to the present invention. After manufacturing the alternative fuel gasification combustion apparatus as shown in FIG. Was installed to measure the temperature. T8 is the temperature of the air supplied from the cement kiln to the alternative fuel gasification combustion unit.

As shown in Fig. 9, waste plastic (fuel) was added at appropriate intervals. It was found that the temperature (TC6) of the gas generated from the alternative fuel gasification combustion device was maintained at about 800~1400℃. In addition, the temperature of the air supplied from the cement kiln (TC8) is maintained at 400 ~ 600 ℃, and is supplied to the alternative fuel gasification combustion device, it was found that it contributes to the increase in the temperature of the exhaust gas. In the present invention, the amount of waste plastic is input in the range of 10 to 75 (kg/hr), and the average temperature of the kiln is maintained at a maximum of 2500°C.

In the case of Fig. 10, in which the air from the cement kiln is not mixed and used, the temperature (TC6) of the gas generated from the alternative fuel gasification combustion device is 750~1050℃, so when the air from the cement kiln is mixed and used, the efficiency of the kiln preheating tower is improved. Not only can it be improved further, it has also been shown that the efficiency of the alternative fuel gasification combustion device is also increased.

Example 2

The residue after treatment in Example 1 was analyzed.

As shown in FIG. 11, after collecting the residue, five analysis samples were collected and analyzed, and the results are shown in Table 1.

	sample 1	sample 2	sample 3	sample 4	sample 5	Average
C	0	0	0	3.21	4.31	1.504
O	29.95	37.14	39.41	38.91	40.62	37.206
Na	6.17	4.42	6.98	5.83	4.84	5.648
Mg	0	0.83	0.89	0.87	0.91	0.7
Al	1.77	2	1.34	1.54	1.93	1.716
Si	20.2	25.28	27.48	28.34	28	25.86
Cl	10.02	4.9	0.98	3.06	2.18	4.228
K	2.67	1.25	0	0	0	0.784
Ca	27.56	24.18	14.56	18.24	17.21	20.35
Fe	1.66	0	3.35	0	0	1.002
Cu	0	0	5.01	0	0	1.002
Sum	100	100	100	100	100	100

As shown in Table 1, it was confirmed that most of the carbon, which is a major component of plastic and which can be burned, was gasified and removed. That is, in the case of the present invention, it was confirmed that carbon, which accounts for 80 to 95% by weight of plastic, can be removed by combustion and gasification, and accordingly, 80 to 95% by weight of the supplied waste plastic can be removed by combustion or gasification.

In addition, as shown in FIG. 12, the remnant was confirmed to have porosity, and thus it was predicted that it could be used as a building material or a covering material.

As described above, specific parts of the present invention have been described in detail, and it will be apparent to those of ordinary skill in the art that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereby. will be. Accordingly, it will be said that the substantial scope of the present invention is defined by the appended claims and their equivalents.

Claims (14)

1. In the greenhouse gas decomposition and immobilization device including a cement kiln

   (a) a combustion reactor;

   (b) 4 to 20 plasma combustion means for supplying plasma to the combustion reactor;

   (c) fuel supply means connected to an upper end of the combustion reactor to supply waste plastic to the combustion reactor;

   It includes a plasma combustion system comprising a,

   The high-temperature gas discharged from the plasma combustion system is mixed with fuel for heating a preheating tower attached to the cement kiln and supplied,

   Greenhouse gas decomposition and immobilization apparatus comprising a cement kiln, characterized in that thermal decomposition by injecting greenhouse gas into the cement kiln.
2. The method of claim 1,

   The apparatus for decomposing and fixing greenhouse gases including a cement kiln, characterized in that the cement kiln pyrolyzes greenhouse gases at a temperature of 1500 to 3000°C.
3. The method of claim 1,

   The greenhouse gas decomposition and immobilization apparatus comprising a cement kiln, characterized in that the greenhouse gas is SF6 or HFCs.
4. The method of claim 3,

   The greenhouse gas decomposition and immobilization apparatus comprising a cement kiln, characterized in that the greenhouse gas is converted to CaF2.
5. The method of claim 1,

   The combustion reactor is a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that the fuel supply means is connected in an upper direction on one side and a gas outlet is formed in a lower direction on the other side.
6. The method of claim 1,

   Greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that an auxiliary combustion means for additionally supplying air or oxygen is installed at an inner lower portion of the combustion reactor.
7. The method of claim 6,

   The auxiliary combustion means is a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that 2 to 100 perforated portions are arranged at regular intervals, and air or oxygen is supplied through the perforated portions.
8. The method of claim 1,

   The combustion reactor is a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that the internal temperature is 500 ~ 2000 ℃, the temperature of the discharged gas 800 ~ 2000 ℃.
9. The method of claim 1,

   The plasma combustion means is a greenhouse gas decomposition and immobilization apparatus comprising a cement kiln, characterized in that arranged at regular intervals on both sides of the combustion reactor along a direction horizontal to the bottom of the combustion reactor.
10. The method of claim 1,

    Each of the plasma combustion means has an output of 10 to 50 kW, and a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that the discharge temperature of the plasma is 5000 to 7000 K.
11. The method of claim 1,

    The fuel supply means is a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that it comprises a fuel transfer means including at least one screw or a pressure feeding device rotating in opposite directions to each other therein.
12. The method of claim 1,

    Between the fuel supply means and the combustion reactor, a fuel dispersing means for uniformly supplying the waste plastic into the combustion reactor is installed.
13. The method of claim 12,

    The fuel dispersing means is a greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that it comprises a mesh net, a structure at regular intervals arranged in multiple layers, a rotating circular plate or a rotating blade.
14. The method of claim 1,

    A greenhouse gas decomposition and immobilization apparatus including a cement kiln, characterized in that after mixing part or all of the heated air generated inside the kiln with air and supplying it to the plasma combustion system.

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